Originally posted by stevebrot Nothing to see here folk...just move on...
For detailed application in English...
JPO Online Translation
The device is a focal length conversion auxiliary lens. There is no specific relation to the FA 35/2 except that the diagrams for the host lens are essentially that of either the FA 35/2 or DA 35/2.4 and the element-by-element text description is specific to the diagram. The converter would provide equivalent FOV to APS-C for FF lenses.
Quote: The the object of this invention is as follows.
Even if you are a case where it applies to a main optical system of a high image circle which is made based on the above awareness of the issues, for example, includes the Leica seal, maintain optical performance of a whole system optical system on a high level.
Acquire a suboptical system which can attain a miniaturization.
The quote follows discussion of quality retention with conversion to a smaller image circle. The claim is made that this is accomplished without significant optical aberrations. The bit about "Leica seal" appears to be an artifact.
Steve
Last edited by stevebrot; 01-11-2018 at 07:05 PM.